Find MB2 easy! | 4K resolution
Finding the second mesio-buccal canal can be challenging - but did you know that some reports have suggested that around 90% of upper first molars have an MB2? This approach uses easily found anatomy and intersecting lines to help you find the orifice to the MB2 much easier!
TIME CODES
0:00 - Incidence of MB2 is 90%!
0:06 - Start by visually mapping out the access cavity you are going to make
0:14 - Area to be accessed
0:20 - Expected orifice entrances in these red dots
0:26 - finding these 3 canals are key to finding MB2
0:36 - Finding pulp horns during access is a good sign you're in the right place
0:45 - De-roofing the pulp chamber
0:58 - Further refinement of the pulp chamber space
1:06 - Irrigation of the pulp chamber with sodium hypochlorite (NaOCl)
1:20 - Finding the 3 canals: mesio-buccal, Disto-buccal and Palatal.
1:31 - Draw a line from the mesio-buccal to the palatal canal orifices
1:37 - Then draw an perpendicular intersecting line from the disto-buccal canal orifice across the first line
1:41 - Look for the mesio-buccal canal orifice in this area (blue ovoid shape)
1:47 - Remove the dentine shelf that covers the MB2 with ultrasonics
2:19 - MB2 finally found!
2:27 - File exploration